On 06/21/2017 01:47 PM, Vinayak Menon wrote: > pagetypeinfo_showmixedcount_print is found to take a lot of > time to complete and it does this holding the zone lock and > disabling interrupts. In some cases it is found to take more > than a second (On a 2.4GHz,8Gb RAM,arm64 cpu). Avoid taking > the zone lock similar to what is done by read_page_owner, > which means possibility of inaccurate results. > > Signed-off-by: Vinayak Menon <vinmenon@xxxxxxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> walk_zones_in_node() becomes quite ugly though, multiple bool params are not nice, and both are there for single special cases. Wonder if replacing this with a new for_each_zone_node() helper would make this better. OTOH it's now isolated only to vmstat.c. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
